Fluid power transmission and controlling apparatus.



W. E. PEARSON. FLUID POWER TRANSMISSION AND CONTROLLING APPARATUS.

APPLICATION FILED AUG. 31, 1909.

Patented Oct. 11, 1910.

3 SHEETSSHEET 1.

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W. E. PEARSON.

FLUID POWER TRANSMISSION AND CONTROLLING APPARATUS. APPLIGATIONIILED AUG. 31, 1909. 972,223. A Patented Oct. 11,1910.

W. armnson. FLUID POWER TRANSMISSION AND CONTROLLING APPARATUS. I

APPLICATION FILED AUG. 31, 1909.

- Patented 0 1;.11,1910.

3'SHEBTSSHEET 3.

. WITNESSES 1;,

A suitable fluid.

' the piston controller A; the said place UNITED STATES PATENT OFFICE. v

WILLIAM E. PEARSON, OF BOSTON, MASSACHUSETTS.

FLUID POWER TRANSMISSION'AND CONTROLLING APPARATUS.

Specification of Letters Patent. Application filed August 81, 1909. Serial 1V0. 515,581.

sists in a peculiarly constructed mechanism which has for its object the complete control and transmission of power by the aid of any The exact construction and operation .of this apparatus may be best understood. by reference to the description, specification and to the accompanying drawings in which Figure 1 is a side elevation. of my apparatus; Fig. 1 is a view in elevation showing a device for simultaneously operating the controlling valves; Fig. 2 is a view showing a horizontal section taken online 2-2 of Fig. 1, showing other parts in plan; Fig. 3 is a vertical section taken on line 3-3 of Fi 2. fn the drawings I have shown a fluid drivingarotary pump A and a fluid driven motor I do not wish to confine myself to this particular kind of pump and motor as others may be used instead. It will be observed, from the drawings, that .both the driving and driven devices above referred to deliver and receive tangentially.

In Fig. 3 the pump A and motor B are shown in section. The pump 'A has a casing as shown and a shaft A, upon which the piston carrierA" is mounted. This piston carrier has pistons A which slide radially and are governed in their movements. by piston controller A is fixed and adjustably held in place b the stud A; the-said stud-A passes throug an elongated hole A in the casing of the pump A and is adjustablyheld in b the clamping nut A. The driven motor has the same construction as the pump A, that is, it has carrying inlet and outlet ports, a piston carrier B mounted upon a shaft B troller B, mounte upon a stud BF adjustably held in the same manner that the stud A is held.

this arrangement, the valves C Y wish the motor istons B B and a con-- I will now describe the device by which the power delivered from the pump A is transmitted to the motor 3, controlled as to amount'and direction of movement.

Referring to Fig. 2, C, D and E represent the casinlgs of corresponding plug-valves C, D and As these plug-valves are made vexactly alike, I will describe but one of them. The control valve D'- consists of a central shaft P, P, see Fig. 3; attached to this central shaft are two valve-way plugs D ,D, through the center of each are ways or passages D D connecting with the several circulating ducts as will be hereinafter explained.

To provide for wear and to maintain ermanently tight joints, I have the followingdescribed construction: f'Bhe' cylindrical opening in the plu case D isslightlyconed as shown so that t e way-plugs D and D on the shaft P, P, as they wear may be made to fit tight by simply forcing them downward to admit of thls, a spiral spring P is laced at the top and an adjusting screw-3 at the bottom, so that as the plu s D, D wear the adjusting screw P may Ee turned outward and thus allow the spring P to force the plugs downward into a smaller part of the coned interior of the valve casing. a

The three plug-valves are operated simultaneously by means of the hand lever N, Fig. 1,-wh1ch operates the rocker-shaft-N; this rocker-shaft N has upon it'three segment gears E, D, C which engage with corresponding bevel gears E, D and C.

which are severally connected with the said valve-plugs.

The operation of my apparatus is as follows: Suppose the pump A sends the fluid in. the direction indicated by the arrow, Fig. 3, through the pi es H and J to and through the way D in t e plug valve D, thence to the pipe J, J 2 to the way D .in the lower part of the plug-valve D, thence through the pipes J 3 and H back to the pump A. In

D, E will be as shown in Fig. 2, and the current of fluid from the. pump will. pass backto the pump not going to the motor B'at all and, of course, oh no work. Now, in case we to rotate in thesame direction that the pump A rotates, we turn the plug valves, by using the hand lever N, so that there will be a passage throu h the upper wayE and also through the lower way Patented Oct. 11, 1910.-

in the same plug but not shown now, the current from the pump will pass throu h pipes H and H, Flg. 2 and valve-way E in the plug E now open (the valve-ways in plugsD and C being closed), thence the fluid will pass through the pi es H and H to the motor B, thence bac c, see Fig. 3, through pipes H H. to the lower passage or way (not shown) in the Iflug valve E, thence through passages H, Fig. "3, back to pump A. Tocause the motor B to rotate in a direction the reverse of that of the pump A, we turn the valves so way-plug C, Fig. 2, shall open in such a manner as to allow the fluid to pass through the ipe I, valveway G (now openhpipe I, l see Figs. 1 and 2, to the pipe f, Fig. 1, tothe under side of the motor B, thence up through the motor to the ipe H thence throu h the pipe 1 ,1 to t e lower way in the p ug C to the pipes I, Fig. 1, to the pipe H and the pump, Fig. 3.

' As the plug valves O, D, E are geared together and operated by a single lever N it is evident that the said plugs must all turn in unison. And they are so arranged as to ways in each that when one set oi ways are wide open, seeD D of the plug D,Fig. 3, the sets of ways in the plugs O and E are closed, and there is no timewhen the ways are all, closed .or all open, and further when one set of ways in one plug are closing then a set of one of the other two plugs are being opened and as soon as the closing set of ways is fully closed, then the opening set of the other plug is fully open.

It is to be-understood that by the construction and arrangement of the valve plugs D E and C and their respective water or fluid ways, no two of the v'alve plugs can be wholly closed .at the same time, that one of them can be wholly closed andonly one, that the central plug D may be partly closed andat the same time one of the side lugs C or E may be partly open or partly c osed. For 1nstance,w en no power is being transmitted to the engine, the central plug D is wide open, see Fig. 2, and the transmission fluid will pass from the ump A through the upper way D? in the p u valve D thence down through thepassage J 2 see liig. 3, to the lower way D and back to the pump A.

If it is desired to drive the motor direct in the same way that the pump works, the

plug valves D, E and 0, all operating tothe motor at rest and graduall made to operate at first with but the slightest ower transmitted and the said ower be gra ually augmented until the full orce is transmitted to. the motor. Now, to stop the motor the valve plugs are turned in the other direction gradually closing the ways in the valve plug E. and opening those in the plug D.

This motion continued will close the ways in E and open them wide in D, and a further continuance will radually close the ways in the valve plu and open the ways in the valve plug which action will cause the motor to rotate in reverse. We observe from the above that under no positions of the valve 1 of the full and clear flow of the water or other fluid of transmission, and that the operator has full control of the amount of power transmitted and its direction.

Claim:

In an apparatus of this description, 8. pump constructed 'to propel any suitable transmitting fluid, three coned plug valves, each provided with two way-passages, means for conducting the said transmitting fluid to the said plug valves, a motor and means for transmittin the said transmission fluid from the wa s o the said plug valves to and from the said motor, a passage way connecting one way of one of the 111 valves to the other way 0 the same plug valve, whereby no restraint of flow of the transmission fluid can take place in the operation of the apparatus; substantially as and for the purpose set forth.

In testimony whereof, I have signed my name to this specification in the resence of two subscribin witnesses, on th1s 30th day of August A.- 1909.

. WILLIAM E. PEARSON.

Witnesses:

WILLIAM EDSON, FRANK G. PARKER.

ugs will there be any prevention 

